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Field Emission from Nanostructured Carbon Films on Si Tips |
WANG Wan-Lu;LIAO Ke-Jun;HU Cheng-Guo;FANG Liang |
Department of Applied Physics, Chongqing University, Chongqing 400044 |
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Cite this article: |
WANG Wan-Lu, LIAO Ke-Jun, HU Cheng-Guo et al 2001 Chin. Phys. Lett. 18 1132-1134 |
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Abstract Nanostructured carbon thin films on Si tips were prepared by hot filament chemical vapour deposition at different substrate temperatures. The Si tips and films were obtained under various deposition conditions in the same reaction chamber. It was found that the field emission properties from graphite-like nanostructured carbon on Si tips were greatly improved as compared with those of nanodiamond films on Si tips. A turn-on field of 1.2 V.cm-1 was observed for high sp2 content thin films on Si tips. The analysis showed that the field emission enhancement effect was caused by the tip geometry, tunnel effect and sp2 content in the films. However, the geometrical enhancement was greater than that of the tunnel and sp2 content effects.
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Keywords:
79.70.+q
73.50.-h
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Published: 01 August 2001
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PACS: |
79.70.+q
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(Field emission, ionization, evaporation, and desorption)
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73.50.-h
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(Electronic transport phenomena in thin films)
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